The 1999–2000 battle of Grozny was the siege and assault of the Chechen capital Grozny by Russian forces, lasting from late 1999 to early 2000. The siege and fighting left the capital devastated. In 2003, the United Nations called Grozny the most destroyed city on Earth. Between 5,000 and 8,000 civilians were killed during the siege, making it the bloodiest episode of the Second Chechen War.